Lock



y 1936. w. R. scHLAGE 2,042,025

LOCK

Filed se t. 26, 1934 INVEN 0R. Whitby E.

fi urruiwld "14W.

A TTORNEYS.

Patented May 26, 1936 UNITED STATES Walter B. Schlagc, San Francisco, Calif., assignor to Schlage Lock Company, San Francisco, CaliL, a corporation of California Application September 26, 1934, Serial No. 745,541

8 Claims.

This invention relates to cylinder locks, and particularly to a retaining and driving connection between the plug of the cylinder and mechanis actuated thereby.

The object of the present invention is generally to improve and simplify the construction and operation of mechanisms of the character described; to provide a retaining and driving connection which is easily removed when changing the combination, repairing, or otherwise, and which permits quick reassembly of the lock parts when a change or repair has been made; to provide a retaining and driving connection whereby a positive drive between the plug and the mechanism actuated thereby may be obtained or whereby a certain amount of lost motion may be insured before a driving connection is made; to provide a spring actuated positive interlock between the retaining ahd driving connection and the plug ;'and further, to provide a. retaining and driving connection which compensates for wear and which takes up all end play between the plug and the cylinder in which it is mounted.

The invention is shown by way of illustration in the accompanying drawing, in which Fig. 1 is a perspective view of the latch bolt unit employed in the type of lock shown in Fig. 3.

Fig. 2 is a perspective view of the cylinder tumbler lock and the spindle bar actuated thereby which is used in the type of lock shown in i 3.

Fig. 3 is a sectional view of a door showing the lock mechanism indicated in Figs. 1 and 2 installed.

Fig. 4 is a perspective view of the cap forming the driving connection between the cylinder plug and the spindle bar.

Fig. 5 is a perspective view of the cylinder tumbler lock.

Fig. 6 is a perspective view of the spindle bar.

Fig. 7 is a perspective view showing one form of cap.

Fig. 8 is a perspective view showing another form of cap.

Fig. 9 is a side elevation of the cylinder plunger lock, said view being partially in section to show the spring actuated pin carried .by the cylinder plug.

Fig. 10 is a sectional view showing a portion of a door lock, said view showing how a driving connection is formed between the cap and a key actuated spindle.

In the operation of certain types of locks, such as door locks, etc., it sometimes happens that the latch bolt of the lock is retracted by key action from one side of the door and by a knob or turnpiece mounted on the other side of the door. In such structures a common spindle bar is desirable, saidspindle bar being connected with the turnpiece, or knob, at one end and with the key actuated mechanism at the opposite end.

The key actuated mechanism usually comprises a cylinder tumbler lock having a rotatable plug in which the key is inserted. Upon insertion of the key, the tumblers are properly positioned to permit rotation of the plug and the rotary movement of the plug is transmitted to turn the spindle bar to retract the latch bolt. The plug of the cylinder lock is not rotatable except when a key is fully inserted therein, hence if the latch bolt 'is to be retracted by the turn-piece, or knob, a lost motion or similar connection must be formed between the plug and spindle bar. The present invention relates to the connection between the key actuated cylinder plug and the spindle bar and the detailed construction of the connection is best shown in Figs. 4 to 10, inclusive. In these drawings, A indicates the housing of the cylinder. lock, B the cylinder plug, which has a keyway formed therein for the reception of a key 0, and D the usual form of spring actuated pin tumblers.

The plug B, in this instance, projects beyond the inner end 3 of the housing, as indicated at 2, and this projection is provided for the reception of a cap 4, the main function of which is that of forming a driving connection between the plug and the spindle bar indicated at l3. Its second function is that of supporting and retaining the spindle bar, as will be more fully described.

The cap, when applied to the projecting end of the plug, is secured against endwise removal by a pair of diametrically opp sed shoulders, one of which is indicated at 5, which engages shoul ders 6 formed on the cap. Recesses I are formed on the projecting end of the plug adjacent the shoulders 5 to receive the shoulders 6 on the cap and to permit the cap to be applied endwise of the projection. After the cap has been applied, it is rotated just a sufiicient amount to bring the shoulders} under the shoulders 5 and aninterlock similar to a bayonet joint is thusformed. After the interlock has been made; it is necessary to secure the cap against rotation about the pro jecting end of the plug. is accomplished by placing a spring actuated pin ordetentjll in the plug which is automatically projected inmate. cess or hole 8'in the cap the moment the shoulders 5 and 6 interlock, thus securing the cap against rotation on the plug extension and preventing release of the interlocking shoulders.

If the spindle bar is to be carried and retained by the cap, a head 9 is provided which fits into a recess 9a formed in the outer end of the plug extension; the head and recess into which it fits being of larger diameter than the opening i formed in the cap through which the spindle bar projects. It lost motion is desired between the plug and spindle bar the opening will be made half round; as shown in Figl' 8,. and if no lost motion is required a slit will be formed as indicated at H in Fig. 7.

Where a lock, such as illustrated in Figs. 1, 2 and 3 is employed, a cap providing lost motion is required as the opposite. end of the spindle bar projects into a slot formedin the turn-piece, indicated at l2, thus if it is desired to retract the latch bolt M by means of the turn-piece it is only necessary to grasp the turn-piece and turn it, as such turning will rotate the spindle bar and the retractor l5 and thereby cause retraction of the latch bolt. Such rotation of the spindle bar is possible in the present instance as the bar is freely rotatable in the cap dueto the lost motion provided. On the other hand if the latch bolt is to be retracted by key operation, it is only necessary to fully insert the key and rotate the same, as such rotation will rotate the plug and the cap and when the cap has rotated a quarter revolution the flat shoulder Illa of the opening will engage the fiat surface of the spindle bar and rotate the same.

In certain types of doors, such'as cupboard doors and the like, an inside tum-piece or knob is not required. In that case the latch bolt will be retracted by the key mechanism only. In such instances there is no necessity for lost motion between the spindle bar and the cap, and a cap of the type shown in Fig. 7 will then be employed. In other locks, for instance of the type shown in Fig. 10, the outer knob indicated at I8 is secured to a spindle I9; hence by rotating the spindle l9 by means of the knob it is possible to retract the latch bolt. The knob in this instance is also shown as provided with a cylinder lock and the key actuated spindle 20 is mounted interiorly of the spindle l9. In that case, when the key is inserted as shown at 2 I, the plug'is rotated by means of the key, and so is the cap. The cap will in that case be provided with a slot similar to that shown in Fig. 7, and the projection 22 on the end of the key actuated spindle 20 will project into the slot.v

Thus when the key and plug, together with the cap, are rotated, the key actuated spindle 20 will also be rotated and by rotation thereof it is possible to retract the latch bolt.

The means whereby motion is transmitted from the spindles l9 and 20 to retract the latch bolt is not shown, but it might be mentioned that the spindles l9 and 20 are provided with roll-back members on their inner ends, in that case engaging a retractor. Hence, by rotating a spindle movement is transmitted to a retractor and this, in turn, is transmitted to the latch bolt to retract the same.

From the foregoing it can be seen that a connection has been provided between the plug of a cylinder lock and a spindle bar whereby a direct driving connection may be made by employing a cap such as shown in Fig. 7, or a lost motion may be obtained wherever required by employing a ca such as shown in Fig. 8.

Other features are the provision of a cap which can be quickly removed or applied when changing the combination oi the pin tumblers, or for inspection, repair, or otherwise.

While certain features of the present invention are more or less specifically described, I wish it understood that various changes may be resorted to within the scope of the appended claims. Similarly, that the materials and finish of the several parts employed may be such as the manufacturer may decide, or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a cylinder tumbler lock having a housing, a rotatable key actuated plug and a plurality of tumblers cooperating with the plug and key, a projection on one end of the plug extending beyond the inner end of the housing, a detachable cap carried by the plug projection, said cap having an opening formed therein, a bayonet locking connection formed between the cap and plug projection, and a spring actuated pin forming an interlock between the cap and plug projection and preventing release of the bayonet lock.

2. In a cylinder tumbler lock having a housing, a rotatable key actuated plug and a plurality of tumblers cooperating with the plug and key, a projection on one end of the plug extending beyond the inner end of the housing, a detachable cap carried by the plug projection, said cap having an opening formed therein, a. bayonet locking connection formed between the cap and plug projection, and a spring actuated pin carried by the plug and projecting through the cap to form an interlock between the cap and plug projection and preventing release of the bayonet lock.

3. In a cylinder tumbler lock having a housing, a rotatable key actuated plug and a plurality of tumblers cooperating with the plug and key, a projection on one end of the plug extending beyond the inner end of the housing, a detachable cap carried by the plug projection, said cap having an opening formed therein, a spindle bar projecting through the opening, a head on the spindle bar and held against the plug. projection by the cap, said opening in the cap forming a driving connection between the cap and spindle bar, and a spring actuated pin forming an interlock between the cap and plug projection and pre- I venting release of the cap.

4. In a cylinder lock, a rotatable key actuated plug having a plurality of tumblers cooperating with the key and plug, a projection on the plug extending beyond the tumblers, a detachable cap carried by said projection, said cap having an opening formed therein, a spindle bar projecting through the opening in the cap, a. recess formed in the outer end of the plug projection, a head on the spindle bar extending into said recess, said spindle bar and head being rotatable with relation to the plug, a driving connection formed between the cap and the plug, and a shoulder in the opening of the cap forming a driving connection between the cap and the spindle bar.

5. In a. cylinder lock, a rotatable key actuated plug having a. plurality of tumblers cooperating with the key and plug, a projection on the plug extending beyond the tumblers, a. detcahable cap carried by said projection, said cap having an opening formed therein, a. spindle bar projecting through the opening in the cap, a recess formed in the outer end of the plug projection, a head on the spindle bar extending into said recess, said spindle bar and head being rotatable with relation to the plug, a driving connection formed between the cap and the plug, and a shoulder in the opening of the cap forming a driving connection between the cap and the spindle bar, said shoulder forming a. lost motion driving connection between the cap and the spindle bar.

6. In a cylinder tumbler lock having a. housing, a rotatable key actuated plug and a plurality of tumblers cooperating with the plug and key, a. projection on one end of the plug extending be- 10 yond the inner end of the housing, a detachable cap carried by the plug projection, a rotatable interlocking connection formed between the cap and the plug projection, a. pin mounted in the plug and extending longitudinally of the plug and projecting from the end of the plug projection, and a spring whereby the pin is projected into engagement with the cap to prevent rotation of the cap and release thereof with relation to the plug projection.

WALTER R. SCI-ILAGE. 

